Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 147, NWS Atlanta, GA

April 11, 20116 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 11, 2011, 10:01 PM EDT for 6 counties in Georgia. It was in force for 44 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 11, 2011, 10:01 PM EDT (02:01 UTC)
Expired: Apr 11, 2011, 10:45 PM EDT
In force: 44 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Carroll County, GA, Cobb County, GA, Douglas County, GA, Haralson County, GA, Paulding County, GA, Polk County, GA

The radar

The Atlanta radar (KFFC), 69 km from the middle of the area, began a volume at 02:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 11, 10:23 PM EDT	TSTM WND DMG	Tallapoosa, GA	HARALSON COUNTY 911 RELAYED A REPORT OF NUMEROUS TREES DOWN IN THE TALLAPOOSA AREA.
Apr 11, 10:32 PM EDT	TSTM WND DMG	Bowdon, GA	CARROLL COUNTY EMA RELAYED A REPORT OF A TREE AND A POWERLINE DOWN IN BOWDON.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 11, 8:08 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.0 hours before the alert went out and 72 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 9 J/kg
Mixed-layer CIN: -501 J/kg
Mixed-layer LCL: 1916 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 355 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

375 
WUUS52 KFFC 120201
SVRFFC
GAC045-067-097-143-223-233-120245-
/O.NEW.KFFC.SV.W.0147.110412T0201Z-110412T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1001 PM EDT MON APR 11 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN COBB COUNTY IN NORTH CENTRAL GEORGIA
  WESTERN DOUGLAS COUNTY IN NORTH CENTRAL GEORGIA
  CARROLL COUNTY IN NORTHWEST GEORGIA
  HARALSON COUNTY IN NORTHWEST GEORGIA
  PAULDING COUNTY IN NORTHWEST GEORGIA
  SOUTHEASTERN POLK COUNTY IN NORTHWEST GEORGIA

* UNTIL 1045 PM EDT

* AT 959 PM EDT/859 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS UP TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 15 MILES NORTHWEST OF ROCKMART TO 12 MILES WEST
  OF TALLAPOOSA TO 28 MILES WEST OF BOWDON...MOVING EAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BUCHANAN...BRASWELL...WACO...BREMEN...ROOPVILLE...MOUNT ZION...
  CARROLLTON...TEMPLE...DALLAS...ACWORTH...DOUGLASVILLE...VILLA
  RICA...POWDER SPRINGS...KENNESAW AND HIRAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM EDT TUESDAY MORNING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3391 8537 3397 8525 3408 8488 3407 8460
      3389 8464 3374 8473 3346 8496 3343 8530
      3388 8539
TIME...MOT...LOC 0201Z 251DEG 54KT 3413 8523 3379 8545
          3349 8570

$$

1 follow-up statement

087 
WWUS52 KFFC 120219
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1019 PM EDT MON APR 11 2011

GAC045-067-097-143-223-233-120245-
/O.CON.KFFC.SV.W.0147.000000T0000Z-110412T0245Z/
POLK GA-PAULDING GA-CARROLL GA-COBB GA-DOUGLAS GA-HARALSON GA-
1019 PM EDT MON APR 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR HARALSON...WESTERN DOUGLAS...WESTERN COBB...CARROLL...PAULDING
AND SOUTHEASTERN POLK COUNTIES...

AT 1016 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED 
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THE MOST DANGEROUS PART OF 
THIS STORM WAS LOCATED 5 MILES WEST OF TALLAPOOSA...MOVING EAST AT 
45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BOWDON...TYUS...ROOPVILLE...MOUNT ZION...WACO...BOWDON 
JUNCTION...BUCHANAN...BREMEN...CARROLLTON AND TEMPLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM EDT TUESDAY MORNING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3391 8537 3397 8525 3408 8488 3407 8460
      3389 8464 3374 8473 3346 8496 3343 8530
      3388 8539
TIME...MOT...LOC 0218Z 250DEG 39KT 3373 8536

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 11, 8:38 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Walker	52 min
Apr 11, 9:21 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd, Gordon, Murray, Polk and 2 more	54 min
Apr 11, 10:11 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Fannin, Gilmer, Gordon, Murray and 2 more	34 min
Apr 11, 10:40 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Dawson, Fannin, Gilmer, Lumpkin and 2 more	65 min
Apr 11, 10:44 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Carroll, Cherokee, Cobb, Coweta, Douglas and 4 more	48 min
Apr 11, 11:42 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Harris, Meriwether, Muscogee, Talbot, Troup	48 min
Apr 12, 4:28 AM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Butts and 73 more	16 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.